Forum OpenACS Q&A: pg 7.1.3 vaccum and InvalidateSharedInvalid: cache state reset

seems like every time I run vacuum analyze on my live server (dump is
60MB uncompressed), the different db connections all log

NOTICE:  InvalidateSharedInvalid: cache state reset

aolserver fumbles around with reopening db connections with but
eventually ends up restarting and then everything is fine.

This happens usually about 20 minutes but as long as an hour and a
half into the vacuum.

(I know 7.2 has vacuum improvements but so far the incompatibilities
have scared me off.)